Re: How many bitcoins do I need to retire in 20 years?

The best way and without any thinking is to just mine as many as you can you never know how many you'll be needing

You'd need a big ass pile of cash to start mining in a meaningful manner now. Those days are a pretty much gone for the little people.

The only realistic way to make Bitcoin that involves mining is mining the right altcoin and selling at the right time. Namely, mining altcoin number "8393589" while its cheap and easy. Wait for the pump. Sell right at the top. Profit.
If you did this with some coins such as Darkcoin, Nautiluscoin, Doge, Monero... and tons other, you could have made tons and tons of money.

So what you're saying is, if you guessed the lottery numbers correctly week after week, you could've made tons and tons of money.

I agree.

With good trading skills, mining and selling coins after studying charts and infographics and being updated about the market and what's happening to things which affect the market, however work it takes, it makes your guess more accurate so I think it can be referred more as a research cheat code rather than a gamble to know the right time to sell coins. I gotta admit though, its really fucking hard.